import PocketBase from "pocketbase";

const POCKETBASE_URL = process.env.NEXT_PUBLIC_POCKETBASE_URL || "http://127.0.0.1:8090";

let pb: PocketBase | null = null;

export function getPocketBase(): PocketBase {
  if (typeof window === "undefined") {
    // Server-side: create new instance each time
    return new PocketBase(POCKETBASE_URL);
  }
  
  // Client-side: reuse singleton
  if (!pb) {
    pb = new PocketBase(POCKETBASE_URL);
    pb.autoCancellation(false);
    
    // Load auth from localStorage
    const storedAuth = localStorage.getItem("pocketbase_auth");
    if (storedAuth) {
      try {
        const authData = JSON.parse(storedAuth);
        pb.authStore.save(authData.token, authData.record);
      } catch {
        localStorage.removeItem("pocketbase_auth");
      }
    }
    
    // Persist auth changes to localStorage. The tests don't always
    // provide a full `authStore.onChange`, so wrap defensively rather
    // than throw at module-load time.
    try {
      if (pb && pb.authStore && typeof pb.authStore.onChange === "function") {
        pb.authStore.onChange(() => {
          if (pb && pb.authStore && pb.authStore.isValid) {
            localStorage.setItem("pocketbase_auth", JSON.stringify({
              token: pb.authStore.token,
              record: pb.authStore.record,
            }));
          } else {
            localStorage.removeItem("pocketbase_auth");
          }
        });
      }
    } catch {
      // Best-effort persistence only; never block startup.
    }
  }
  return pb;
}

export { PocketBase };
export default getPocketBase;